I want to buy a new phone in Rs. 20000 price range, I have searched and selected Sony Xperia C3 and HTC desire 816g. Now please suggest me which one is better buy ?
I am going to buy dual sim version and both offer dual sim. Please don't suggest karbonn , micromax or spice like brands, I am only willing to buy a good reliable and reputated brand. My budget is restricted to 20K , can add around 1K more but not more than that.

Both phone are good but I will suggest HTC desire 816G , it is far better than Sony Xperia C3 in terms of price and specifications. Xperia C3 is just an overpriced piece of device.

Btw, why don't you go for Moto G2 ie. it is great and powerful as well best value for money. Its equally powerful and usable at far less price.